An underwire bra (also under wire bra, under-wire bra, or underwired bra) is a brassiere that utilizes a thin, semi-circular strip of rigid material fitted inside the brassiere fabric. The wire may be made of metal, plastic, or resin. The wire helps to lift, separate, shape, and support a woman's breasts. It's available in different cup and back sizes and should be worn in the correct size. This may vary as women breasts and bodies change. To get the perfect fit book a free bra fitting with us.